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Kohler Command CH12.5S Maintenance
| Engine Model: Kohler Command CH12.5S |
| Engine Type: 4-cycle 1-cylinder horizontal shaft air-cooled gasoline engine |
| Total Displacement: 24.3 cu.in (398 cc) |
| Rated Engine Power: 12.5 Hp (9.4 kW) at 3600 rpm |
| Fuel System: Carburetor with adjustable jet or fixed jet |
Engine Oil Type (Summer Time) .............. SAE 10W-30
Engine Oil Type (Winter Time) .............. SAE 5W-20, 5W-30
Oil Classification (API) .............. SG, SH, SJ, or higher
Oil Capacity, L (qts) .............. 1.9 (2.0)
Oil Filter Part Number .............. 52 050 02-S or 12 050 01-S
Fuel Filter Part Number .............. 25 050 21-S
Air Filter Element Part Number .............. 47 083 01-S
Air Filter Pre-Cleaner Part Number .............. 52 083 01-S
Main Fuel .............. 1-1/2 turns
Idle Fuel .............. 1-1/4 turns
Low Idle Speed, rpm .............. 1500±75
High Idle Speed, rpm .............. 3600±50
Spark Plug Type .............. Champion RC12YC
Spark Plug Gap, mm (in) .............. 1.01 (0.040)
Module Air Gap, mm (in) .............. 0.2-0.3 (0.008-0.012)
Spark Plug Thread Size, mm (in) .............. 14 (0.55)
Spark Plug Torque, Nm (ft-lb) .............. 38.1-43.4 (28-32)
Service Precleaner .............. Every 25 hours
Check Oil Level in Gear Reduction Unit .............. Every 50 hours
Replace Air Cleaner Element .............. Every 100 hours
Change Engine Oil .............. Every 100 hours
Clean Cooling Areas .............. Every 100 hours
Change Oil Filter .............. Every 200 hours
Check Spark Plug Gap .............. Every 200 hours
Replace Fuel Filter .............. Every 200 hours
Check Carburetor Adjustment .............. Every 200 hours
Check and Adjust Valve Clearance .............. Every 300 hours
Replace Spark Plug .............. Every 300 hours
Cylinder Head, Nm (ft-lb) .............. 24, 48.9 (18, 36)
Rocker Arm Screw, Nm (ft-lb) .............. 11.3 (8.3)
Flywheel Retaining Screw, Nm (ft-lb) .............. 66.4 (49.1)
Connecting Rod Cap, Nm (ft-lb) .............. 11.3 (8.3)
Carburetor Mounting Nut, Nm (ft-lb) .............. 6.2 (5.4)
Closure Plate, Nm (ft-lb) .............. 24.4 (18.1)
Fuel Pump Screw, Nm (ft-lb) .............. 5.1 (3.8)
Spark Plug, Nm (ft-lb) .............. 38.0-43.4 (28-32)
Ignition Module, Nm (ft-lb) .............. 4.0-6.2 (2.9-4.6)
Air Cleaner Nut, Nm (ft-lb) .............. 9.9 (7.3)
Muffler Retaining Nut, Nm (ft-lb) .............. 24.4 (18.1)
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